US4658506A - Device in clearing saws - Google Patents

Device in clearing saws Download PDF

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Publication number
US4658506A
US4658506A US06/744,276 US74427685A US4658506A US 4658506 A US4658506 A US 4658506A US 74427685 A US74427685 A US 74427685A US 4658506 A US4658506 A US 4658506A
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US
United States
Prior art keywords
arm
saw
frame
joint
abutment member
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US06/744,276
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English (en)
Inventor
Goran A. Nilsson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Husqvarna Forest and Garden AB
Original Assignee
Electrolux Motor AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Electrolux Motor AB filed Critical Electrolux Motor AB
Assigned to ELECTROLUX MOTOR AB reassignment ELECTROLUX MOTOR AB ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: NILSSON, GORAN A.
Application granted granted Critical
Publication of US4658506A publication Critical patent/US4658506A/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G23/00—Forestry
    • A01G23/02—Transplanting, uprooting, felling or delimbing trees
    • A01G23/08—Felling trees
    • A01G23/091—Sawing apparatus specially adapted for felling trees
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B9/00—Portable power-driven circular saws for manual operation
    • B27B9/04—Guiding equipment, e.g. for cutting panels

Definitions

  • the present invention relates to a device in clearing saws of the type comprising saw means, especially a circular saw blade, which is movable in relation to a portable frame and whose periphery is at least partly exposed or capable of being exposed to permit sawing or cutting through a tree-trunk.
  • the present invention aims at providing a device which in an absolutely reliable and very simple manner ensures that the saw blade does not risk to come into contact with and damage the tree to be left.
  • this is achieved in that there is associated with the frame of the saw at least one arm which is pivotal by means of a joint and provided, at a distance from the joint, with an abutment member located outside the periphery of the saw means or saw blade and adapted, when desired, to be applied against another tree-trunk located adjacent the trunk to be cut, in order during cutting of the first trunk to positively maintain said saw means or saw blade spaced from said other trunk as long as the abutment member is applied thereto.
  • FIG. 1 is a perspective view showing a clearing saw assembly equipped with the device according to the invention
  • FIG. 2 is a perspective view illustrating the use of the clearing saw when cutting one of two young trees growing adjacent each other;
  • FIG. 3 is a partial top plan view illustrating the operation of the device according to the invention.
  • FIG. 4 is an exploded view illustrating the different components of the device.
  • FIGS. 5-6 are views illustrating an alternative embodiment of the device.
  • FIG. 1 shows a clearing saw comprising a frame generally designated 1 which is in the form of a tube which is provided at one end with a motor 2 and a handle or grip 3. At the opposite end of the tube, there is provided a rotatable circular saw blade 4 which is mounted in a housing 5 extending at an angle to the tube 1. In a rearward direction away from the housing 5, there extends a sector-shaped guard plate 6 covering about 1/4 of the circumference of the saw blade, while the remaining 3/4 of the circumference thereof is exposed such that the saw blade can saw through thin or medium-thick tree-trunks.
  • the abutment member is in the form of a flat iron having a central, planar portion 10 and two arcuate end portions 11, 11' (also see FIG. 4), this giving the abutment member a shape which is concave or widening in an outward direction away from the saw blade.
  • the joint generally designated 7 comprises an upright pin 12 on which there is placed a sleeve 13 connected to the abutment plate 9 by means of two tubes or rods 14, 14' together forming the arm 8.
  • joint 7 in this case is located at the center of rotation of the saw blade 4, the length of the arm 8 being but slightly greater than the radius of the saw blade, whereby the abutment plate 9 will be located immediately outside the serrated periphery of the saw blade.
  • the joint 7 also comprises two friction washers 15, 15' for instance washers of plastic of a high friction coefficient, which are adapted to engage opposite ends of the sleeve 13.
  • the joint further comprises a locking washer 16 and a locking nut 17.
  • the joint 7 with the associated arm and the abutment member is mounted on an attachment 18 in the form of a plate of semi-circular cross-section which in a suitable manner, for instance by means of clamps 19, can be mounted on an existing clearing saw. It is however self-evident that the device according to the invention can also be provided directly in the bearing housing 5 in connection with the manufacture of a new clearing saw.
  • the abutment member 9 may be swung back to an inoperative position in the region of the guard plate 6. As soon as the operator encounters two trees 20, 21, as shown in FIGS. 2 and 3, growing close together, the abutment member 9 is passed in between the trunks of the two trees and applied against the trunk 21 to be saved, whereupon the saw blade 4, by means of the grip 3, is moved in an arcuate path about the trunk 21 during cutting of the trunk 20 of the tree to be cleared away.
  • the saw blade will be positively held at a certain minimum distance from the trunk 21 in that the joint 7 and, hence, the center of the saw blade will describe a circular path of movement the radius of which is determined by the length of the rigid arm 8.
  • one of the trees can be readily cut without any risk of the rotating saw blade coming into contact with and damaging the other tree.
  • the inventive concept is also applicable to saws having other types of saw means than a circular saw blade.
  • the saw means may consist of an endless chain which is caused in a suitable manner to rotate along a suitable path of movement, for instance a circular or substantially triangular path.
  • other means than friction washers can be used for retaining the abutment member, as desired, in a given angular position in relation to the frame when the abutment member is not actuated by a manual force.
  • the friction washers may be replaced by one or more springs which automatically return the abutment member to a given starting position when the abutment member is not used.
  • the saw blade or saw means used may also be at least partly covered by one or more additional guard plates which can be removed in connection with the cutting operation.
  • FIGS. 5 and 6 illustrate an alternative embodiment in which the arm 8 provided with the abutment member 9 is mounted on a hub-like member 23 which is part of the joint 7 and on which there is mounted a second arm 22 serving as a kick-back protection.
  • the two arms extend at an obtuse angle with respect to each other, for instance 130°-160°.
  • the arm 22 will make a certain, small angle (e.g. 15°-25°) with the longitudinal axis of the frame tube and project a substantial distance from the periphery of the saw blade 4.
  • the saw In the cutting of a single trunk 20', the saw can be moved straight against the trunk and pressed against it, whereby the projecting portion 22'of the arm will abut against the trunk.
  • the saw blade 4 rotating counter-clockwise in FIG. 5, thereafter comes into contact with the trunk, this will be abutting against the arm portion 22' in a reliable manner in that the arm 8 is arrested by its engagement with the frame tube 1.
  • the arm 22 makes an efficient protection against kick-back of the saw as the saw blade engages the trunk.
  • the arm 8 extends obliquely downwards from the hub member 23 in order, when in a position of rest, to abut against the frame tube 1, while the arm 22 extends obliquely upwards, suitably parallel to the frame tube, so that it always gets clear of the frame tube.

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  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Ecology (AREA)
  • Environmental Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Sawing (AREA)
  • Knives (AREA)
  • Harvester Elements (AREA)
US06/744,276 1984-06-25 1985-06-13 Device in clearing saws Expired - Fee Related US4658506A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8403373 1984-06-25
SE8403373A SE438977B (sv) 1984-06-25 1984-06-25 Anordning for rojsagar

Publications (1)

Publication Number Publication Date
US4658506A true US4658506A (en) 1987-04-21

Family

ID=20356336

Family Applications (1)

Application Number Title Priority Date Filing Date
US06/744,276 Expired - Fee Related US4658506A (en) 1984-06-25 1985-06-13 Device in clearing saws

Country Status (4)

Country Link
US (1) US4658506A (enrdf_load_stackoverflow)
JP (1) JPS61100134A (enrdf_load_stackoverflow)
DE (1) DE3521685A1 (enrdf_load_stackoverflow)
SE (1) SE438977B (enrdf_load_stackoverflow)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4827617A (en) * 1987-12-07 1989-05-09 Shepherd David J Tree cutting guide shoe for clearing saw
US5107665A (en) * 1991-07-12 1992-04-28 Wright Randolph L Spatial guide for attachment to a line trimmer
US5319856A (en) * 1990-03-16 1994-06-14 Tenho Kolehmainen Pruning device
US5940973A (en) * 1998-04-21 1999-08-24 Deere & Company Trimmer guide
US6381854B1 (en) * 1997-07-31 2002-05-07 Dario Coero Borga Bush-cutter for the manual mowing of grass and the like
US6842985B2 (en) * 2000-11-29 2005-01-18 Black & Decker Inc. Pivotal plant protector
US9168188B2 (en) 2007-11-13 2015-10-27 Orthopediatrics Corporation Cast removal system
CN108552009A (zh) * 2018-06-20 2018-09-21 中国林业科学研究院林业新技术研究所 丛生竹择伐机
US10791682B2 (en) 2017-02-08 2020-10-06 Douglas Bruce Kitchen Vegetation cutting and clearing system and method
US11252868B2 (en) * 2019-09-27 2022-02-22 Tree Well Wizard, LLC Landscape trimming tool attachment device

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5524349A (en) * 1995-01-27 1996-06-11 Dolin; Earl S. Lawn trimmer shield
DE19528358C2 (de) * 1995-08-02 1999-09-30 Stihl Maschf Andreas Freischneidegerät

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US673105A (en) * 1901-01-21 1901-04-30 Wesley Young Tree-trimmer.
US1382350A (en) * 1920-03-16 1921-06-21 Edward H Davis Pruning-machine
US1579783A (en) * 1924-06-09 1926-04-06 Ross Victor Trimming device
US1738896A (en) * 1929-07-13 1929-12-10 Swift & Co Meat-saw guard
US2274421A (en) * 1939-11-21 1942-02-24 Linn Olaf B Lindstrom Power driven pruning device
US2342052A (en) * 1942-02-21 1944-02-15 Ingersoll Rand Co Portable cutting tool
US2490255A (en) * 1945-10-05 1949-12-06 Cummings Machine Works Portable power actuated rim-driven annular saw
US2520411A (en) * 1947-12-08 1950-08-29 Jenkins Orville Rotary pruning saw
US2691392A (en) * 1949-05-25 1954-10-12 Joseph H Jacobs Power saw-automotive type
US3029511A (en) * 1961-03-27 1962-04-17 Joseph Padgett Jr Pruning mechanism with rotary saw
US3513888A (en) * 1967-07-10 1970-05-26 Textron Inc Portable power driven circular saw
US3931676A (en) * 1974-02-11 1976-01-13 Merle William E Portable power saw apparatus
US4364435A (en) * 1980-12-22 1982-12-21 Emerson Electric Co. Lawn edger

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7434753U (de) * 1975-02-13 Argus Gmbh Sägekopf für eine Entastungssäge
DE1101043B (de) * 1953-09-01 1961-03-02 Hermann Papst Vorrichtung zum Entasten von Baeumen od. dgl.
DE1757940A1 (de) * 1968-06-29 1971-08-12 Stihl Maschf Andreas Freischneidegeraet

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US673105A (en) * 1901-01-21 1901-04-30 Wesley Young Tree-trimmer.
US1382350A (en) * 1920-03-16 1921-06-21 Edward H Davis Pruning-machine
US1579783A (en) * 1924-06-09 1926-04-06 Ross Victor Trimming device
US1738896A (en) * 1929-07-13 1929-12-10 Swift & Co Meat-saw guard
US2274421A (en) * 1939-11-21 1942-02-24 Linn Olaf B Lindstrom Power driven pruning device
US2342052A (en) * 1942-02-21 1944-02-15 Ingersoll Rand Co Portable cutting tool
US2490255A (en) * 1945-10-05 1949-12-06 Cummings Machine Works Portable power actuated rim-driven annular saw
US2520411A (en) * 1947-12-08 1950-08-29 Jenkins Orville Rotary pruning saw
US2691392A (en) * 1949-05-25 1954-10-12 Joseph H Jacobs Power saw-automotive type
US3029511A (en) * 1961-03-27 1962-04-17 Joseph Padgett Jr Pruning mechanism with rotary saw
US3513888A (en) * 1967-07-10 1970-05-26 Textron Inc Portable power driven circular saw
US3931676A (en) * 1974-02-11 1976-01-13 Merle William E Portable power saw apparatus
US4364435A (en) * 1980-12-22 1982-12-21 Emerson Electric Co. Lawn edger

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4827617A (en) * 1987-12-07 1989-05-09 Shepherd David J Tree cutting guide shoe for clearing saw
US5319856A (en) * 1990-03-16 1994-06-14 Tenho Kolehmainen Pruning device
US5107665A (en) * 1991-07-12 1992-04-28 Wright Randolph L Spatial guide for attachment to a line trimmer
US6381854B1 (en) * 1997-07-31 2002-05-07 Dario Coero Borga Bush-cutter for the manual mowing of grass and the like
US5940973A (en) * 1998-04-21 1999-08-24 Deere & Company Trimmer guide
US6842985B2 (en) * 2000-11-29 2005-01-18 Black & Decker Inc. Pivotal plant protector
US9168188B2 (en) 2007-11-13 2015-10-27 Orthopediatrics Corporation Cast removal system
US10791682B2 (en) 2017-02-08 2020-10-06 Douglas Bruce Kitchen Vegetation cutting and clearing system and method
CN108552009A (zh) * 2018-06-20 2018-09-21 中国林业科学研究院林业新技术研究所 丛生竹择伐机
CN108552009B (zh) * 2018-06-20 2023-10-03 中国林业科学研究院林业新技术研究所 丛生竹择伐机
US11252868B2 (en) * 2019-09-27 2022-02-22 Tree Well Wizard, LLC Landscape trimming tool attachment device

Also Published As

Publication number Publication date
SE8403373D0 (sv) 1984-06-25
JPH0352927B2 (enrdf_load_stackoverflow) 1991-08-13
JPS61100134A (ja) 1986-05-19
DE3521685A1 (de) 1986-02-20
DE3521685C2 (enrdf_load_stackoverflow) 1987-07-23
SE438977B (sv) 1985-05-28

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Legal Events

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AS Assignment

Owner name: ELECTROLUX MOTOR AB, DROTTNINGGATAN 1, BOX 1010, 5

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:NILSSON, GORAN A.;REEL/FRAME:004651/0119

Effective date: 19861204

Owner name: ELECTROLUX MOTOR AB, SWEDEN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:NILSSON, GORAN A.;REEL/FRAME:004651/0119

Effective date: 19861204

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Year of fee payment: 4

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REMI Maintenance fee reminder mailed
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Effective date: 19990421

STCH Information on status: patent discontinuation

Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362